Liees et fils



3 sheets-sheet 1.

(No Model.)

- J. DEMOGEOT.

MACHINE FOR. MAKING OR PREPARING MOLDS FOR CASTING METAL. No. 298.949.

Patented May 20, 1884.

i a d N, PETERS PholwLilhogn h-n Wiliflsim D C.

INVENTOR: m

WITNESSES: 452%(9M.

By his Attorneys,

3 SheetsSheet 2.

(No Model.)

J. DEMOGEOT.

MACHINE FOR MAKING OR PREPARING MOLDS FOR CASTING METAL. No. 298,949.

PatengpakM lm l lml f l /ri INVENTOR:

WITNESSES:

By his .flttorizeys,

(No Model.) '3 SheetsSheet 3.

J. DEMOGEOT.

MACHINE FOR MAKING 0R PREPARING MOLDS FOR CASTING METAL.

No. 298,949. Patented May 20,1884.

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JULns nnMoeno'r, or DUNKIRK, ASSIGNOR TO THE SOOIETE L. nnnonvm LIERS nrFILS, or PARIS, FRANCE.

MACHINE FOR MAKING OR PREPARING MOLDS FOR CASTING METAL.

SPECIFICATION forming part of Letters Patent No. 298,949, dated May 20,1884.

Application filed January 16, 1884. (No model.) Patented in France April14, 1880, No. 186,124, and January 9, 1882, No.

146,766, and January 11, 1882, No. 146,795,

To all whom it may concern Be it known that I, JULEs DEMOGEOT, a citizenof the French Republic, and a resident of Dunkirk, France, have inventedcertain Improvements in Machines for Making or Preparing Molds forCasting Metals, of which the following is a specification.

My machine is distinguished from all others of its class by severalessential peculiari- IO ties, all of which will be set forthhereinafter.

In order that my invention may be the better understood, reference maybe had to the accompanying drawings, wherein Figure l is a transversevertical section of I 5 my improved machine, taken substantially in theaxis of shaft G. Fig. 2 is a longitudinal vertical section of the same.Figs. 3, 4., 5, 6, and7 are detached detail views, on a larger scale,which will be referred to more particularly hereinafter. Fig. 8 is aplan view of the box T, showing its temporary sliding cover.

The press portion of the machine is composed of a suitable frame, WV, inwhich are arrangedto slide vertically two plates or followers, A and B.At the top of this frame is rotatively mounted a shaft, G, on which aresecured eccentrics O O and D D. The eccentrics O are set with theirthrows opposite to the throws of eccentrics D. The eecentrics O arecoupled to the upper follower, A, by connecting-rods O, and theeccentrics D to the lower follower, B, by connectingrods D. Rotation ofshaft G imparts a vertical reciprocating movement to followers A and Btoward and from each other; but they always move in opposite directionssimultaneonsly. Rotation is imparted to the shaft G through aworm-wheel, E, thereon, a worm or screw, F, on a crossshaft, F, above,anda o crank-wheel, G, on F, provided with a handle, H. The shaft F mayalso be provided with tight and loose pulleys I for the same purpose. Inorder to adjust the faces of the followers toward or from each other, Ipro- 5 vide the lower face of follower Awith aplate,

, J, and the upper face of follower B with a plate, K, and these areconnected to their respective followers by adjusting-screws L. This isbest shown in Figs. 1, 3, and 4.

and in England March .26, 1881, No. 1,354.

N is atrack or tramway, on which is mounted a box, M, provided withtrack-wheels O. In box M is arranged a plate, P, which rests 011 fouradjusting-screws, Q, in M. 011 this plate rests one of the patterns B.These patterns may be constructed similar to those usually employed inmolding-machines-that is, each pattern bears one face or half of thearticle to be reproduced. I may make these of metal, plaster, or othersuitable materials.

On the box M is placed the section of the flask S, to receive the sand.This is or may be an ordinary flask with bars across its middle, and itmay be made in two parts, separable one from the other. On the flask Sis placed the upper box, T, similar to M, in which is arranged a plate,U, (corresponding to P,) bearing the pattern V for the other face orarticle to be reproduced. The plate U rests on springs X, which takeunder and are secured to projecting parts on U and bear on the externalflange, b, on T. This construction is best illustrated in Fig. 5, whichis a side elevation of T and U, showing the spring at one side. Theupward movement of U is limited by nuts on the bolts or rods Y, whichare secured in lugs on T and pass through lugs on U.

Fig. 1 shows the several parts of the machine when the mold is finishedand still under the maximum pressurcthat is to say, the sand in theflask S has had the patterns R and V pressed into its upper and lowerfaces. The rotation of the shaft G now causes the follower A to rise andthe follower B to descend. The upper pattern, V, is lifted by 85springsX till it is free fromthe sand, and the pattern R and plate Pfollow the downward movement of follower B, by reason of their weight,until they rest upon the screws Q in lugs on M. These screws serve asstops to limit the downward movement of the pattern, and they are bestshown in Fig. 6, which is a longitudinal section of the box M, plate K,plate P, and pattern B. This construction permits the springs w to yieldas the follower A rises, and thus allow the pattern to be lifted fromthe sand gently. It also gives a yield ing elastic pressure to thepattern as it enters the sand. .When the followers have moved out of theway, the workman rolls the two boxes, M and T, the parts U V R P, andthe flask S, out on track N (see to the right in 5 Fig. 2) to the end ofsame, where a tilting mechanism is provided, that I will now describe.

At the end of the track N are fixed, adjustably, posts I), and at thetops of these, at a, are fulcrumed levers Z. To the short arms of theselevers are suspended a heavy counterbalance-weight, e, and the longerarms of the levers are provided with slot-s or grooves a. A pawl or dog,(Z, on the lever Z, engages a shoulder or tooth, Z, on post 1), wherebythe weight 6 is held suspended, whilethe long arms of levers Z are heldhorizontal. On the box T is a projecting flange or rib, b, which is onthe same level as the groove a in lever Z, and when the parts are runout, as before stated, this flange on T enters the grooves in thelevers, and, striking dog (I, frees it from the shoulder on b. Theweight 6 now counterbalances T and the parts connected there- 2 5 with,and these are supported in levers Z, by reason of the engagement of theribs on T with the grooves in said levers. The construction of thelevers Z and the retaining-pawl d is best shown in Fig. 7, whichpresents one of said levers and its attachments in plan and elevation.The groove a becomes a slot near the point where the pawl is hung, andas the flange on T passes along the groove it finally comes in contactwith a tail. on the pawl or some part of same and trips the latter, asabove stated. The workman now turns T over, so as to invert it, as shownin Fig. 2. He then liftsoff the flask S containing the sand mold anddeposits it in the place where he wishes to make the pile of molds.Another empty flask S is now placed on box M and filled with sand. Hethen places sand on theface of pattern V in T until the latter is nearlyfull, and in order to prevent this sand from falling out in turning Tback to its place he slips a plate, m, of sheet metal into the grooves fin T. This is best illustrated in Fig. 8, wherein plate m, which passesthrough a narrow slot in the side of T, is shown as 50 partly inserted,in the manner of a sliding cover for a box. The box T is now turned backon the flask S and the plate of sheet metal removed, when the whole isrun under the follower A to be pressed, as before described.

In order that the box M may be stopped at the proper point, the latteris provided with a block or stop-piece, d, on its bottom to engage asimilar stop-piece placed at the proper point on the track.

In order to better illustrate the construction of the attachment of theplates J and K to their respective followers, I have shown a part offollowerAin plan and detached in Fig. 4, and

65 a section of the same in Fig. 3, on line 3 3 in Fig. 4.

It will be observed that each face of the sand in S contains the mold ofone face or half of the article to be reproduced. I pile these flasks Sone on top of the other, securing them by dowels or clamps, or both,making a vertical pile of from ten to twenty molds, and

cast them all at one time.

In Fig. 2 I have shown the track or tramway N as extending out onopposite sides of the press, and two tilting devices. This constructionenables me to employ two sets of workmen-one engaged in pressing whilethe other is removing their flask and refilling.

Instead of employing a flask like that described, and making a mold ofone-half the article in each face, the flask S may be divisiblehorizontally at the middle, and the sand in them be separted by a plateor otherwise. In this case the two parts of the flask, called the dragand cope, will be back-to-back when subjected to pressure, and they maybe afterward separated and put together, face to face, as will be wellunderstood; or it may be feasible to make the flask in halves by atransverse out, so that when the sand mold is laid down the halves ofthe flask can be disengaged carefully therefrom and sent' back to themachine. In this case, however, the sand mold should be protected insome way by a wooden or other casing to prevent it from bursting whenthe metal is poured in.

The advantages which my machine offer to the moulder are: The rapiditywith which the molds are made, both faces or halves of the article beingmolded at one operation and in one machine; the convenience with whichmolds from my machine may be stacked or piled and the whole cast at oneheat; the patterns last longer than when used by hand; the cleanness andsmoothness of the molds, owing to the gentle and steady withdrawal ofthe patterns therefrom; economy in casting, owing to there being but onegit or sinking head for many molds.

My machine may be employed for making molds for casting in all metals,no matter how large or how small the castings may be, or for whatpurpose they are designed.

I do not claim a molding-machine wherein the followers are arranged tomove in opposite directions simultaneously; nor do I claim a track ortramway arranged in connection with the press for shifting the flask.These have been before proposed.

Having thus described claim- 1. The combination, in a machine for makingsand molds for castings, of the boxes M and T, the flask S, the plates Uand P, and the patterns V and R, all arranged substantially as setforth.

2. The combination, to form a mechanism for tilting the box T, of thepost I), provided with a shoulder or projection, Z, the slotted orgrooved lever Z, bearing a pawl, d, and the weight 6, all arranged tooperate substantially as set forth.

3. The combination with the box M, provided my invention, I

with wheels 0, and four screws, Q, of the plate In witness whereof Ihave hereunto signed 10 P, mounted or resting on said screws, and the myname in the presence of two subscribing pattern R, resting on plate P,all substantially witnesses. as herein set forth. i

4. The combination, with the box T, pro- J ULES DEMOGEOT. Vided with aflange, b, and rods Y, of the plate U, springs X, and pattern V, allcon- Witnesses: structed and arranged substantially as and for ADETTI,the purposes set forth. 1 L. VANDENBORED.

